2019/07/02 by M. Saint-Paul, Saint-Paul, M., P. Monçeau +2
Earth and Planetary Sciences · Materials Science · Physics and Astronomy · #Advanced Thermoelectric Materials and Devices #FOS: Physical sciences #High-pressure geophysics and materials #Organic and Molecular Conductors Research #Physics of Superconductivity and Magnetism #Strongly Correlated Electrons (cond-mat.str-el)
paper · pdf · doi:10.48550/arxiv.1907.01206
openalex publication_date 2019/07/02 · openalex created_date 2022/07/28 · openalex updated_date 2026/07/28
The microscopic description of the CDW phase transition is still debated and\nremains controversial. The question is how to extend the Peierls picture to\nreal systems in higher dimensions. A general tendency is found in the\nthermodynamic properties such as the specific heat jump DCp and the decrease of\nthe longitudinal elastic stiffness constant DC11/C11 at the CDW phase\ntransition in several materials, such as quasi-one dimensional (K0.3MoO3),\ntransition metal dichalcogenide compounds (2H-NbSe2), rare earth tritellurides\n(TbTe3, ErTe3, HoTe3) and intermetallic compound (Lu5Ir4Si10). DCp and DC11/C11\nincrease as the temperature of the phase transition TCDW and TCDW2\nrespectively. The same tendency is found at the spin density phase transition\nin chromium and CuGeO3.Thermodynamic properties of almost all CDW systems,\nalthough it has been recognized to exhibit large fluctuations, follow the\nclassical mean field BCS type behavior.\n